While the Soviets called their heavy guns self-propelled artillery, the Germans called them assault guns. In reality, the Soviets used them in both the direct fire support and tank-hunter role.

The heavy guns of the ISU-152 could be found supporting assaulting infantry with direct fire. Their ability to instantly destroy bunkers, buildings, and defensive positions provided excellent infantry support.

The ISU-122 more often supported advancing Soviet tank battalions by providing overwatching fire. They would generally take up a position on the flanks of the tank formations and use their large guns to target enemy anti-tank guns, tank-hunters, and panzers.

You can used this box to get you Tyazheliy Samokhodniy Artileriskiy Polk (Self-propelled Artillery Regiment) started from the forth coming River Of Heroes battle book. This new company allows you to field up to four Guards Heavy Assault Gun Companies armed with ISU-122 or ISU-152. The IS-2 tank is for the Battalion command.